Common Stock And Equity Based Compensation - AmeriGas Common Unit Based Award Activity (Details) (USD $)			12 Months Ended				12 Months Ended				12 Months Ended
	Sep. 30, 2014 Amerigas Performance Units and Stock Units	Sep. 30, 2013 Amerigas Performance Units and Stock Units	Sep. 30, 2014 AmeriGas Performance Unit	Sep. 30, 2014 AmeriGas Partners Common Units	Sep. 30, 2014 Vested Amerigas Performance Units and Stock Units	Sep. 30, 2013 Vested Amerigas Performance Units and Stock Units	Sep. 30, 2014 Vested AmeriGas Performance Unit	Sep. 30, 2014 Vested AmeriGas Partners Common Units	Sep. 30, 2014 Non-Vested Amerigas Performance Units and Stock Units	Sep. 30, 2013 Non-Vested Amerigas Performance Units and Stock Units	Sep. 30, 2014 Non-Vested AmeriGas Performance Unit	Sep. 30, 2014 Non-Vested AmeriGas Partners Common Units
Number of AmeriGas Partners Common Units Subject to Award
Number of Equity-based Units - beginning balance (in units)	200,235	224,167			37,207	47,715			163,028	176,452
Granted			53,800	32,658			633	15,936			53,167	16,722
Forfeited			(8,150)	(7,783)			0	0			(8,150)	(7,783)
Vested			0	0			15,319	52,061			(15,319)	(52,061)
Performance criteria not met			(31,317)				(31,317)				0
Awards paid				(63,140)				(63,140)				0
Number of Equity-based Units - ending balance (in units)	200,235	224,167			37,207	47,715			163,028	176,452
Weighted Average Grant Date Fair Value (per Unit)
Weighted Average Grant Date Fair Value - beginning balance (in usd per unit)	$ 44.82	$ 47.88			$ 44.27	$ 47.92			$ 44.95	$ 47.87
Granted			$ 41.50	$ 46.37			$ 41.37	$ 48.00			$ 41.50	$ 44.81
Forfeited			$ 45.96	$ 51.10			$ 0.00	$ 0.00			$ 45.96	$ (51.10)
Vested			$ 0.00	$ 0.00			$ 53.93	$ 47.58			$ 53.93	$ 47.58
Performance criteria not met			$ 54.51				$ 54.51				$ 0.00
Unit awards paid				$ 48.00				$ 48.00				$ 0.00
Weighted Average Grant Date Fair Value - ending balance (in usd per unit)	$ 44.82	$ 47.88			$ 44.27	$ 47.92			$ 44.95	$ 47.87